Mailster vs Omnisend
Compare WordPress plugins and tools side by side. Pick products with “Compare” in the software directory.
| Feature | Mailster v2.0.3 · checked 23 Oct 2026 Paid · ★ 3.5/5 Visit Details | Omnisend Visit Details |
|---|---|---|
| At a glance | ||
| Active installs | 7,000+ | — |
| Last updated | October 15, 2026 | — |
| Editions | Mailster Compatibility Tester · Mailster ($) | — |
| Pros | Server, PHP and mail checks in one admin page; Clear pass, warning or error result for each check; Free to run before buying Mailster | — |
| Cons | Offers a Mailster licence purchase on the same page; Downloads the paid Mailster plugin after checkout; Only checks readiness, it is not the newsletter plugin | — |
| Mentioned in our posts | 2 | 1 |
| More features | ||
| Other features | Server and PHP compatibility checks, Mail delivery check through wp_mail, Admin page for running tests, Mailster licence checkout and download ($) | — |
| Integrations | ||
| Payment | Freemius checkout | — |
| Plugins | Mailster download endpoint | — |
| Requires WordPress | 6.0 | — |
| Requires PHP | 7.4 | — |
| Tested up to | 7.1 | — |
| Phones home | No | — |
| External services | mailster.co | — |